Ergodic Secrecy Sum-Rate for Downlink Multiuser MIMO Systems With Limited CSI Feedback

被引：29
|
作者：
Li, Na [1 ]
Tao, Xiaofeng [1 ]
Xu, Jin [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Wireless Technol Innovat Inst, Natl Engn Lab Mobile Network Secur, Beijing 100876, Peoples R China
来源：
IEEE COMMUNICATIONS LETTERS | 2014年 / 18卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Ergodic secrecy sum-rate; multiuser MIMO; limited CSI feedback; physical layer security; BROADCAST CHANNELS; CONFIDENTIAL MESSAGES; CAPACITY;
D O I：
10.1109/LCOMM.2014.2319821
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
This paper investigates the ergodic secrecy sum-rate for the downlink multiuser MIMO system with independent confidential messages, each of which is intended for one of the users and should keep secret from others. We adopt zero-forcing beamforming with limited channel state information (CSI) feedback at the transmitter, and derive the closed-form expression for the ergodic secrecy sum-rate. Moreover, we analyze some of its asymptotic characteristics, which provide guidance on secure transmission design. Finally, all theoretical results are validated by numerical simulations.
引用
收藏
页码：969 / 972
页数：4
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